Commits
Mike J. Chen committed 8f4d8bd72fb
ARM: disable preemption in machine_shutdown Since the smp call to stop the other cpus are handled in those cpus in interrupt context, there's a potential for those smp handlers to interrupt threads holding spin locks (such as the one a mutex holds). This prevents those threads from ever releasing their spin lock, so if the cpu doing the shutdown is allowed to switch to another thread that tries to grab the same lock/mutex, we could get into a deadlock (the spin lock call is called with preemption disabled in the mutex lock code). To avoid that possibility, disable preemption before doing the smp_send_stop(). Change-Id: I7976c5382d7173fcb3cd14da8cc5083d442b2544 Signed-off-by: Mike J. Chen <mjchen@google.com>